Intertherm M1B Series - Wiring Diagrams - M1 M Models; M1 M Series Direct Ignition Furnace Wiring; Control Module Status Indicators

34
Figure 38
Figure 38. 
See Table
BLOWER
MOTOR
SINGLE
SPEED
ON/OFF
SWITCH
C
R
G
W
GAS VALVE
HI-LIMIT
AUX. LIMIT
TRANS-
FORMER
PRESSURE
SWITCH
654321
654321
COMBUSTION FAN
L N
CR
24 V
115 V
21
1
4
5
2
6
3
1
2
3
4
5
6
7
8
9
IGNITOR
L1
NEUTRAL
GROUND SCREW
FURNACE ELECTRICAL BOX
24V
TIE
WIRE
See Table
CONNECTOR
HOUSING CAP
GROUND
SCREW
CONTROL LIGHT STATUS
WOLLEYDER
langiS emalF dooGNO ydaetSKO lortnoCNO ydaetS
langiS emalF kaeWgniknilB
rewop oN
FFO ydaetS
Rapid FlashFalse flame or internal control faultSteady OFFNo Flame Signal
1 FlashLimit switch is open
2 FlashesPressure switch is open with inducer on
3 FlashesPressure switch is closed with inducer off
4 FlashesLockout due to failed ignition
5 Flashes115 vac & neutral reversed or no ground
CONTROL
LIGHTS
Jumper must be removed if
converting to a multispeed blower.
Jumper is required for M1MA
models and M1MB 090
A/C & Heating Speeds: Refer to
Table 12, A/C Blower Selection
in the manual
RED (LO) BLACK (HIGH)
BLUE (MED. HI)
ORANGE (MED. LO)
WHITE
RED (LO)
BLACK (HIGH)
BLUE (MED. HI)
WHITE
654321
LEGENDS
115V: FIELD 115V:
24V: FIELD 24V:
BLOWER
MOTOR
4 SPEED
NOTES
1. Incoming power must be polarized. Observe color
coding. (See furnace data label for electrical information.)
2. If any of the original wires (as supplied with the
appliance) must be replaced, use 105˚C Thermoplastic
type wire or its equivalent.
SUPPLIED
BYINSTALLER
C W G R
COM
MOTOR
BLOWER
3 SPEED
MOTOR
See Table
See Table
Gas Direct Ignition Furnace,
Heating & A/C Ready,
M1M All Models.
710152D
(Replaces 710152C)
Blower Wire Table
Blower Wire Connections
Furnace
Wire #1
Wire #2 Wire #3 Wire #4
Model
Red
BlackBlueOrange
M1MA 056/
TieTie Tie
Control
070/077/090
WrappedWrapped Wrapped
Board "H"
M1MB
TieControl TieControl
056
WrappedBoard "C"Wrapped Board "H"
M1MB
TieTie ControlControl
070/077
WrappedWrapped Board "H"Board "C"
M1MB
TieControl TieTie
90
WrappedBoard "H"Wrapped Wrapped
M1M(C,D)
ControlTie TieControl
056/070
Board "H"Wrapped WrappedBoard "C"
M1M(C,D)
TieTie TieControl
077/090
WrappedWrapped WrappedBoard "H"
01/15
WIRING DIAGRAM
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
NEU
XFRM
L1 H
C
BLACK
BLACK
BLACK
WHITE
WHITE
WHITE
ORANGE
ORANGE
BLACK
BLACK
BLACK
RED
GREEN
WHITE
YELLOW YELLOW
BLACK
BLACK
GREEN
BLUE
BLUE
BLUE
GRAY
BLACK
RED
